NCCCO Lattice Boom Crawler Crane
Questions And Answers With Verified
Solutions Already Passed!!! (GRADED
A+)
On a lattice boom crawler crane, the main boom length is measured from the: -
ANSWER✔✔Center of the boom heel pins to the center of the boom tip sheave
What is the main purpose of mid point suspension pendants? - ANSWER✔✔To
absorb shock that comes with dynamic loading
The main purpose of a gantry or a mast on a crane is: - ANSWER✔✔To increase
the crane's leverage on the boom
What effect does having the crawlers retracted have on a crawler crane with a
long boom - ANSWER✔✔Increases the probability of tipping
When using a mobile crane on a barge, the crane's load capacity chart shall be -
ANSWER✔✔Replaced by a list chart
Blocking can be placed under the ends of tracks to: - ANSWER✔✔Increase the
crane's stability when operating over the front or back
A crawler crane is based on ________ stability of static load. - ANSWER✔✔75%
What quadrant produces the least amount of ground pressure on a lattice crawler
- ANSWER✔✔Side
When a crawler crane is on a barge, the list chart must be provided by the -
ANSWER✔✔Manufacturer
When operating a crawler crane, the ground pressure will always be highest over
the - ANSWER✔✔Corner
, Unless working in loos soft soil, a crawler crane should always travel _____ on
pick and carry operations - ANSWER✔✔Towards the load
Why use mats of cribbing - ANSWER✔✔To reduce ground pressure
Mats are usually _____ to hold together. - ANSWER✔✔Bolted
A crawler crane traveling forward is defined as traveling in the direction of -
ANSWER✔✔The idler
When disassembling or assembling booms on lattice boom cranes, it is extremely
important to - ANSWER✔✔Never touch any pin on any boom section located
between the pendant attachment points and the crane
On a lattice boom crane, the device that automatically stops the boom when it
nears the maximum angle is the - ANSWER✔✔Boom hoist kick out
When is it safe to handle loads under power lines - ANSWER✔✔The load nor any
part of the crane can come closer than regulations allow
Manufacture specs only permit a certain amount of boom to be suspended out
past the connection point of the pendants during assembly or disassembly of the
boom. This portion of boom is called the - ANSWER✔✔Cantilever Length
When installing a pin-connected lattice boom on a mobile crane, you should
always - ANSWER✔✔Use the boom hoist pawl to hold the boom
When making a lift with a lattice boom crawler crane, ground pressure can be
reduced by lifting over the - ANSWER✔✔Side
Pendant spreader bars on long booms are used to prevent - ANSWER✔✔Main
pendants from scrubbing the boom sides
By order of hitch strength, which is the correct answer - ANSWER✔✔Basket,
vertical, choker
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